Page 543 - Offshore Electrical Engineering Manual

530 Index

Independent Competent Person (ICP), 413, Internal communications, 177–178
415–416, 418–423, 432. See also Electrical Internal winding fault, 344
Independent Competent Person (Electrical Interrupter types
ICP) ACB, 72–73
Individual relay protection elements, 210 bulk oil circuit breakers, 73
Inductance, 313 HRC cartridge fuses, 71, 72f
Induction disc relays interior of typical vacuum interrupter, 74f
electrical checks limited oil volume circuit breakers, 73
insulation tests, 366 SF6 circuit breakers, 75
secondary injection tests, 366–368 vacuum circuit breakers and contactors, 73–75
mechanical checks, 366 Intertripping, 213–214
Induction motor, 103, 124, 125f Interturn, 344
Inductive couplers, 137, 138f faults, 208, 211–212
Industrial type, 47, 49f–50f Intrinsic safety, 309
Inert gas system, 335–336 Intrinsically safe (IS), 45, 291
Infinite busbar system, 41 barriers, 324
Ingress Protection (IP), 98, 104–105, 124, 124t cables, 99
IP54, 307 for intrinsically safe circuits, 99
rating, 297, 298t circuits, 99, 313
Installation, 431–432 instrument earthing, 292f
alarm system, 113 instrument panel, 293f
and operating manuals for equipment, 347 Inverse definite minimum time (IDMT), 208,
practice 227–228
cable support systems, 284–286 Inverse square law, 146
communications, 283–284 Invertors, 283
decommissioning and removal/abandonment IP. See Ingress Protection (IP)
phases, 286 IPSA short circuit analysis software, 246–248
distribution transformers, 280 Iron loss test, 349
lighting and small power, 282 IS. See Intrinsically safe (IS)
motors and generators, 280–282 Island mode, 39
secure power supply systems, 283 Isolated situation, 13–14
switchgear and motor control centres, 279–280 Isolux diagrams, 156
written schemes of examination, 287
Institution of Electrical Engineers Wiring J
Regulations (IEE Wiring Regulations), 227 Jack-up
Instrument earths, 291 platforms, 455
Instrumentation, 268–269 rig, 339
alarm annunciator, 268–269 Jacket lighting, 162
metering, 268 Jacking systems, 339
synchronising indicators, 268 Junction box and distribution board interconnection
Insulated gate bipolar transistors (IGBTs), 119 diagram, 194
Insulation
materials, 25–26 K
resistance, 350, 360, 376, 377t, 378 Key services, 5
tests, 355, 360 Kilovolt-ampere rating and rotating speed, 35–36
tests, 366, 369 Kirchhoff’s first law, 224
Integral cycle fired heater controllers, 111 Knee point, 364
Integral cycle fired process heater controllers, 117 Knockout pot, 51, 55
Integrated automation system (IAS), 330
Integrated control systems, 330 L
Integrated intelligent MCCs, 108 Ladder rack, 286
Integration module, 220 Land-based switchboards, 7
Intelligent MCCs, 108 Large drive switchboards 3.3–6.6 KV, 77